Hello, plc'r'us;
No need to ask for pricing, Amprolizer is downloadable from the Siemens website for free. Good little piece of software for looking at the present status of a Profibus network, as mentionned by _Spiff_. One problem though: it runs on Windows 95. So you need an older computer, probably with an ISA card (CP5412A2) to connect to the network.
Let me check if something newer is available.
Hope this helps,
Daniel Chartier